Plants Are Affected by an Array of Pathogens

question 21

Multiple Choice

Plants are affected by an array of pathogens. Which of the following is a likely plant defence/response against disease?

• A)cells near the point of infection destroying themselves to prevent the spread of the infection
• B)production of chemicals that repel pathogens
• C)transcriptional level recognition followed by production of stress proteins
• D)thickening the cuticle so that pathogens have trouble penetrating the tissues
• E)stopping all xylem and phloem movement within infected tissues

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Definitions:

Archaeabacterium

A group of microorganisms that are similar to bacteria but genetically distinct, often found in extreme environments.

Cyanobacterium

Photosynthetic, aquatic microorganisms that are gram-negative and often contribute to the formation of oxygen in Earth's atmosphere.

Green Alga

Single-celled, colonial, or multicelled photosynthetic protist that has chloroplasts containing chlorophylls a and b.

Prokaryotic

Cells that lack a true, membrane-bound nucleus and most other organelles, characteristic of organisms such as bacteria.